The Technique (IMAGE) European Synchrotron Radiation Facility Caption a) Opaque amber blocs from Charente-Maritime. b) radiography of a bloc with inclusions in absorption mode. c) the same radiograph in propagation phase contrast mode with 990 mm of propagation distance (pixel size: 5 µm). Credit M. Lak, P. Tafforeau, D. Néraudeau (ESRF Grenoble et UMR CNRS 6118 Rennes). Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.